diff --git a/share/mk/bsd.test.mk b/share/mk/bsd.test.mk
index 86351cff3c6..9c596197208 100644
--- a/share/mk/bsd.test.mk
+++ b/share/mk/bsd.test.mk
@@ -10,6 +10,9 @@
 
 __<bsd.test.mk>__:
 
+# Third-party software (kyua, etc) prefix.
+LOCALBASE?=	/usr/local
+
 # Tests install directory
 TESTSDIR?=	${TESTSBASE}/${RELDIR:H}
 
diff --git a/share/mk/suite.test.mk b/share/mk/suite.test.mk
index 26f1494d36f..451762adb99 100644
--- a/share/mk/suite.test.mk
+++ b/share/mk/suite.test.mk
@@ -45,13 +45,6 @@ KYUAFILE?= auto
 # unqualified TEST_METADATA variable.
 #TEST_METADATA.<test-program>+= key="value"
 
-# Path to the prefix of the installed Kyua CLI, if any.
-#
-# If kyua is installed from ports, we automatically define a realtest target
-# below to run the tests using this tool.  The tools are searched for in the
-# hierarchy specified by this variable.
-KYUA_PREFIX?= /usr/local
-
 .if ${KYUAFILE:tl} != "no"
 FILES+=	Kyuafile
 FILESDIR_Kyuafile= ${TESTSDIR}
@@ -85,7 +78,7 @@ Kyuafile: Makefile
 	@mv ${.TARGET}.tmp ${.TARGET}
 .endif
 
-KYUA?= ${KYUA_PREFIX}/bin/kyua
+KYUA= ${LOCALBASE}/bin/kyua
 .if exists(${KYUA})
 # Definition of the "make test" target and supporting variables.
 #
diff --git a/share/mk/tap.test.mk b/share/mk/tap.test.mk
index ec860882f15..28b52af12bb 100644
--- a/share/mk/tap.test.mk
+++ b/share/mk/tap.test.mk
@@ -26,7 +26,7 @@ TAP_TESTS_PERL?=
 TAP_TESTS_SH?=
 
 # Perl interpreter to use for test programs written in this language.
-TAP_PERL_INTERPRETER?= /usr/local/bin/perl
+TAP_PERL_INTERPRETER?=	${LOCALBASE}/bin/perl
 
 .if !empty(TAP_TESTS_C)
 PROGS+= ${TAP_TESTS_C}